Perhaps you should try some spelling variations:
"coder coder complete sample problem" » "coder coder complex sample problem" (Expand search), "coder coder complex samples problem" (Expand search), "coder lower complete sample problem" (Expand search), "coder model complete sample problem" (Expand search), "coder over complete sample problem" (Expand search), "coder coder complete complex problem" (Expand search), "coder decoder complete sample problem" (Expand search), "code code complete sample problem" (Expand search), "decoder codec complete sample problem" (Expand search)
"on python python python programming" » "on pythons python python programming" (Expand search), "on piton python python programming" (Expand search), "on pitons python python programming" (Expand search), "in python pythin python programming" (Expand search), "of python pythof python programming" (Expand search), "_ python pyth_ python programming" (Expand search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder coder complete sample problem") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder complete sample problem\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder complete sample problem ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder complete sample problem") OR ("on python python python programming"))*.